Air purifier



FIG. 1 is a front perspective view of our design.

FIG. 2 is an elevation view showing the front side of our design.

FIG. 3 is an elevation view showing the rear side of our design.

FIG. 4 is an elevation view showing the right side of our design.

FIG. 5 is an elevation view showing the left side of our design.

FIG. 6 is a plan view showing the top side of our design; and,

FIG. 7 is a plan view showing the bottom side of our design.

The broken line showing of the feet and the control features is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

The ornamental design for an air purifier, as shown and described. 